WO2017107136A1 - 液压缓冲系统及组装方法 - Google Patents

液压缓冲系统及组装方法 Download PDF

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Publication number
WO2017107136A1
WO2017107136A1 PCT/CN2015/098686 CN2015098686W WO2017107136A1 WO 2017107136 A1 WO2017107136 A1 WO 2017107136A1 CN 2015098686 W CN2015098686 W CN 2015098686W WO 2017107136 A1 WO2017107136 A1 WO 2017107136A1
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WO
WIPO (PCT)
Prior art keywords
damping system
valve
relief valve
hydraulic
spring
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PCT/CN2015/098686
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English (en)
French (fr)
Inventor
郝庆军
谭小亮
苏贤进
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伊卡路斯(苏州)车辆系统有限公司
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Priority to PCT/CN2015/098686 priority Critical patent/WO2017107136A1/zh
Publication of WO2017107136A1 publication Critical patent/WO2017107136A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60D—VEHICLE CONNECTIONS
    • B60D5/00—Gangways for coupled vehicles, e.g. of concertina type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/22—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/516—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics resulting in the damping effects during contraction being different from the damping effects during extension, i.e. responsive to the direction of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke

Definitions

  • the present invention relates to the field of articulated vehicle control technology, and more particularly to a hydraulic buffer system for an articulated vehicle having a three-stage damping system and damping enabling smooth transitions; and a method for assembling a relief valve in a damping system.
  • CN 204284291 U discloses a hydraulic damper for safely turning the vehicle based on the hinge system, which can be based on the angle or speed of the vehicle. The damping torque is changed.
  • the disadvantage is that the hydraulic control oil circuit will generate a large damping step during the switching process, which may cause the vehicle to vibrate and affect the passenger's ride comfort.
  • it is used for hydraulic control.
  • the overflow valve on the oil circuit will cause bad in the installation process, and the test difficulty will increase, which will affect the product quality.
  • the present invention provides a hydraulic buffer system for an articulated vehicle by providing a primary damping system, a secondary damping system, and a tertiary damping system on the pressure control oil passage, and in the second
  • the channel damping system is provided with a channel capable of relieving the low pressure.
  • the smooth transition of the damping can be ensured, the stability of the vehicle is improved, and the shock absorption effect is improved; in addition, the present invention is directed to the pressure control oil.
  • the relief valve used on the road by setting the overflow valve structure and combining the assembly method The quality inspection of the installation process of the relief valve is now carried out to ensure that the quality of the product is not affected.
  • a hydraulic buffer system for an articulated vehicle comprising a hydraulic cylinder composed of a cylinder block and a piston assembly, the amount of expansion and contraction of the piston assembly is driven by a pressure control oil passage, and a shock absorber is mounted on the hydraulic cylinder, the pressure control
  • the oil passage includes a primary damping system, a secondary damping system and a tertiary damping system, wherein the primary damping system is connected in parallel with the secondary damping system, and the secondary damping system is provided with an oil passage A passage for depressurizing in a low pressure condition, one end of the third-order damping system is connected to a confluence point of the primary damping system and the secondary damping system, and the other end is connected to a rod cavity in the cylinder.
  • said secondary damping system comprises a first relief valve, said first relief valve being capable of generating damping in a closed state; said primary damping system comprising a damper disposed at a front end of said damper There is a solenoid valve; the tertiary damping system includes a second relief valve.
  • a notch is formed in the valve cover of the first overflow valve, and the square of the cross-sectional area of the notch is inversely proportional to the oil passage pressure.
  • an integrated block is disposed on the cylinder block, an oil sump is disposed in a middle portion of the integrated block, and a horizontal oil filling port and a vertical oil filling port are disposed at a periphery of the integrated block.
  • the first relief valve or the second relief valve comprises a valve seat, a valve core is arranged in a middle of the valve seat, a spring is nested at a top end of the valve core, and a top end of the spring
  • the fixing is carried out by an adjusting member, the spring and the adjusting member being housed inside the valve body, and a valve cover is mounted on the bottom of the valve body.
  • a method for assembling the first relief valve comprising the steps of: (1) supporting the valve body in the valve seat with the valve seat as a support, in the valve core The top end sleeves the spring, the top end of the spring is fixed by the adjusting element to form an integral structure; (2) the valve cover is connected with the valve body, the adjusting element, the A spring is integrally inserted into the interior of the valve body such that the valve cover contacts the adjustment member to form a relief valve.
  • the damping damping is jointly provided by the primary damping system and the secondary damping system.
  • the electromagnetic valve is in an open state, when the vehicle reaches a certain angle during the turning process,
  • the solenoid valve is closed, at which time the hydraulic oil is only from the second
  • the first damper system is provided with a first relief valve.
  • the hydraulic oil can generate a certain damping pressure through the passage.
  • the pressure of the hydraulic oil is continuously increased, and when the certain value is reached, the first relief valve can be triggered to open, and the damping pressure is changed during the transition from the primary damping system to the secondary damping system. Achieve steady growth to maintain the stability of the vehicle.
  • the technical solution improves the structure of the first relief valve, and adopts a new assembly method, so that it can be detected during the assembly process, and the inspection is not qualified after the assembly is completed. Rework occurs and the work efficiency is improved.
  • the oil filling ports in different directions are arranged on the integrated block, which not only reduces the processing difficulty, but also improves the oil injection efficiency.
  • the present invention has the following technical effects through the above technical solutions:
  • FIG. 1 is a schematic structural diagram of a hydraulic buffer system disclosed in an embodiment of the present invention.
  • FIG. 2 is a cross-sectional structural view of a first relief valve according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an integrated block according to an embodiment of the present invention.
  • a hydraulic buffer system for an articulated vehicle comprising a hydraulic cylinder composed of a cylinder 4 and a piston assembly, the amount of expansion and contraction of the piston assembly can be driven by the pressure control oil passage, and the hydraulic cylinder is provided with a reduction a shock control oil passage comprising a primary damping system 1, a secondary damping system 2 and a tertiary damping system 3, wherein the primary damping system 1 is connected in parallel with the secondary damping system 2,
  • the secondary damping system 2 is provided with a passage capable of releasing pressure on the low pressure.
  • the low pressure at this time means that the hydraulic pressure value generated by the oil passage is smaller than the opening pressure value of the first relief valve, and one end of the tertiary damping system 3 It is connected to the confluence point of the primary damping system 1 and the secondary damping system 2, and the other end is connected to the rod cavity in the cylinder 4.
  • the first stage damping system 1 includes a damper 11 at the front end of which a solenoid valve 12 is provided, through which the switch of the oil circuit on which the damper 11 is locked can be controlled, that is, The control hydraulic system enters the damper 11 through the primary damping system 1;
  • the secondary damping system 2 includes a first relief valve, please refer to FIG. 2, the bonnet of the first relief valve
  • the upper opening is provided with a notch 26, and the square of the cross-sectional area of the notch 26 is inversely proportional to the oil passage pressure, so that the first relief valve can still generate a certain damping in the closed state to compensate for the primary damping system.
  • a second relief valve is provided on the damping system 3.
  • the first relief valve includes a valve seat 21, and a valve core 22 is disposed in a middle portion of the valve seat 21,
  • the top end of the valve body 22 is nested with a spring 23, the top end of which is fixed by an adjusting member 24 for pressure adjustment, and the spring 23 and the adjusting member 24 are accommodated in Inside the valve body 25, a valve cover is mounted on the bottom of the valve body 25.
  • the valve body 22 is first supported by the valve seat 21, and the valve core 22 is sleeved in the valve seat 21, The top end of the valve body 22 is sleeved with the spring 23, and the top end of the spring 23 is fixed by the adjusting member 24 to form an integral structure, and the performance of the spring 23 and the adjusting member 24 after assembly is tested.
  • valve cover is connected to the valve body 25, and the adjusting component 24 and the spring 23 are integrally inserted into the valve body 25, so that The bonnet is in contact with the adjustment member 24 to form the first relief valve, and by modifying the first relief valve, and adopting a new assembly method, the spring 23 can be secured
  • the adjusting element 24 is inserted before the valve body 25 is detected It avoids the need for frequent disassembly after the completion of the overall assembly, resulting in inefficient work and affecting the quality of the product.
  • the solenoid valve 12 on the primary damping system 1 is in a powered state.
  • the first-stage damping system 1 and the secondary damping system 2 jointly provide damping damping on the pressure control oil passage.
  • the solenoid valve 12 on the primary damping system 1 is in a de-energized state.
  • the pressure control oil routes the secondary damping system 2 to provide damping damping, that is, hydraulic oil.
  • a notch 26 is provided on the first relief valve, and the hydraulic pressure generated by the oil passage
  • the pressure value is less than the opening pressure of the first relief valve, the hydraulic oil may gradually flow out through the notch when the first relief valve is not opened, and generate a certain damping pressure
  • the pressure value It is proportional to the amount of oil flowing through the hydraulic oil, that is, the turning speed of the vehicle is proportional to the turning speed of the vehicle.
  • the first relief valve exerts a damping effect; as the amount of hydraulic oil increases, the pressure value generated continuously Rise, when the pressure generated reaches When the value is constant, the first relief valve is triggered to open, and the first relief valve exerts an overflow function.
  • the solenoid valve 12 on the primary damping system 1 is closed.
  • the damping damping of the pressure control oil passage is converted by the primary damping system 1 and the secondary damping system 2 to be provided only by the secondary damping system 2, and has the following technical effects: (1)
  • the damping damping can achieve a smooth rise, solve the problem that the step is easy to be generated in the prior art, and ensure the stability of the vehicle during driving; (2) in the prior art, when the secondary damping system 2 When the first overflow valve is stuck, the oil is passed through the gap, which can avoid the cylinder valve 4 blasting caused by the overflow valve, causing the vehicle to run out of control, thereby improving the safety of the vehicle;
  • the first relief valve may be oiled by adjusting the size of the notch when the first relief valve is in a closed state. The damping generated is adjusted to meet the driving requirements of different vehicles and to increase flexibility.
  • the present invention is provided with an integrated block 5 on the cylinder block 4.
  • an oil sump 6 is provided in the middle of the integrated block 5, and a horizontal oil filling port is provided around the integrated block 5.
  • 7 and the vertical oil filling port 8 can effectively solve the phenomenon that the integrated block 5 causes trimming and edge breaking when opening the oil filling port, greatly reduces the processing difficulty, helps to improve the qualification rate of the integrated block 5, and is convenient and shockproof.
  • the welding is carried out to improve the quality of the shock absorber; at the same time, the oil filling speed can be increased to avoid the jamming of the solenoid valve 12 and improve the production efficiency.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

一种液压缓冲系统及组装方法。该系统包括设置在液压缸上的压力控制油路，该油路包括一级阻尼系统（1）、二级阻尼系统（2）和三级阻尼系统（3），一级阻尼系统（1）和二级阻尼系统（2）并联，在二级阻尼系统（2）上设有泄压通道，三级阻尼系统（3）的一端连接一级阻尼系统（1）和二级阻尼系统（2）的汇流点，另一端与缸体内的有杆腔相连通。该系统能提高车辆的稳定性、提升减震效果；该组装方法在组装过程中实现检测，从而提升产品质量。

Description

液压缓冲系统及组装方法 技术领域
本发明涉及铰接车辆控制技术领域，具体涉及一种用于铰接车辆的液压缓冲系统，具有三级阻尼系统且阻尼能够实现平稳过渡；以及用于对阻尼系统中的溢流阀进行组装的方法。
背景技术
随着我国城市化进程的加快，交通方式的多样化在不断得到日新月异的发展，铰接车辆作为城市公交的一种主要工具，通过利用铰接装置将两节或者多节车身组合在一起，来实现大客流载运，受到了市场的推崇。
铰接车辆在行驶过程中，通常需要依靠专门的液压机构使车身改变行进方向，CN 204284291 U公开了一种基于铰接系统实现车辆安全回转的液压缓冲器，该液压缓冲器能够根据车辆的角度或车速改变阻尼扭矩，然其不足之处在于，液压控制油路在进行切换的过程中，会产生较大的阻尼阶跃，容易造成车辆出现震动，影响乘客乘坐的舒适度；另外，用于液压控制油路上的溢流阀在安装过程中会造成不良，测试难度增加，影响产品质量。
发明内容
为了解决上述技术问题，本发明提供了一种用于铰接车辆的液压缓冲系统，通过在所述压力控制油路上设置一级阻尼系统，二级阻尼系统和三级阻尼系统，并在所述二级阻尼系统上设置能够对低压进行泄压的通道，在进行不同阻尼系统的切换过程中，能保证阻尼进行平稳过渡，提高车辆的稳定性，提升减震效果；另外，本发明针对压力控制油路上采用的溢流阀，通过设置溢流阀结构并结合组装方法，实 现对溢流阀的安装过程质量检验，确保产品的质量不受影响。
本发明的技术方案如下：
一种用于铰接车辆的液压缓冲系统，包括由缸体和活塞组件组成的液压缸，通过压力控制油路驱动活塞组件的伸缩量，在所述液压缸上装有减震器，所述压力控制油路包括一级阻尼系统，二级阻尼系统和三级阻尼系统，所述一级阻尼系统与所述二级阻尼系统并联相接，在所述二级阻尼系统上设有能够使油路处于低压情形下进行泄压的通道，所述三阶阻尼系统的一端连接于所述一级阻尼系统与所述二级阻尼系统的汇流点，另一端与缸体内的有杆腔相接通。
作为优选，所述二级阻尼系统包括第一溢流阀，所述第一溢流阀在关闭状态下能产生阻尼；所述一级阻尼系统包括有阻尼器，在所述阻尼器的前端设有电磁阀；所述三级阻尼系统包括第二溢流阀。
进一步地，在所述第一溢流阀的阀盖上开设有缺口，所述缺口的横截面面积的平方与油路压力成反比。
进一步地，在所述缸体上设有集成块，在所述集成块的中部设有过油槽，在所述集成块的周边设有水平注油口和垂直注油口。
作为优选，所述第一溢流阀或者所述第二溢流阀包括阀座，在所述阀座的中部装有阀芯，所述阀芯的顶端嵌套有弹簧，所述弹簧的顶端通过调节元件进行固定，所述弹簧及所述调节元件容置在阀体内部，在所述阀体的底部装有阀盖。
一种用于对所述第一溢流阀进行组装的方法，包括以下步骤：(1)以所述阀座为支撑，将所述阀芯套在所述阀座内，在所述阀芯的顶端套设所述弹簧，通过所述调节元件对所述弹簧的顶端进行固定，形成一体结构；(2)将所述阀盖与所述阀体相接，将所述调节元件、所述弹簧一体插入至所述阀体内部，使所述阀盖与所述调节元件相接触，形成溢流阀。
车辆在直线行驶过程中，减震阻尼由所述一级阻尼系统和所述二级阻尼系统共同提供，此时，所述电磁阀处于开启状态，当车辆在转弯过程中达到一定角度时，所述电磁阀关闭，此时液压油仅从所述二 级阻尼系统上经过，在所述二级阻尼系统上设有第一溢流阀，在所述第一溢流阀处于关闭的状态下，液压油经过所述通道能够产生一定的阻尼压力，随着液压油压力的不断增大，当达到一定值时能够触发所述第一溢流阀打开，使阻尼压力在由所述一级阻尼系统向所述二级阻尼系统转变的过程中，阻尼压力实现稳步增长，从而保持车辆的平稳性。
为了能够保持液压缓冲系统的稳定性，本技术方案对所述第一溢流阀进行结构改进，并采用新的组装方法，使其在装配过程中能够进行检测，避免了装配完成后检测不合格出现返工现象，提高了工作效率；同时在集成块上设置不同方向的注油口，不仅降低了加工难度，而且提高了注油效率。
有益效果：本发明通过以上技术方案，具有以下技术效果：
(1)解决了现有技术中车辆在转弯过程中因阻尼压力出现阶跃造成车辆晃动现象，使阻尼压力能够进行平稳增加，增强了车辆在转向过程中的稳定性；
(2)避免了二级阻尼系统出现卡死现象，导致车辆出现失控，确保了车辆的安全性；
(3)能够实时对第一溢流阀或者第二溢流阀进行性能检测，提高了工作效率，能够有效保证产品质量。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例所公开的液压缓冲系统的原理结构示意图；
图2为本发明实施例所公开的第一溢流阀的剖视结构示意图；
图3为本发明实施例所公开的集成块的结构示意图。
图中数字和字母所表示的相应部件名称：
1、一级阻尼系统；11、阻尼器；12、电磁阀；2、二级阻尼系统；21、阀座；22、阀芯；23、弹簧；24、调节元件；25、阀体；26、缺口；3、三级阻尼系统；31、第二溢流阀；4、缸体；5、集成块；6、过油槽；7、水平注油口；8、垂直注油口。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行详细的描述。
一种用于铰接车辆的液压缓冲系统，请参照图1，包括由缸体4和活塞组件组成的液压缸，通过压力控制油路能够驱动活塞组件的伸缩量，在所述液压缸上装有减震器，所述压力控制油路包括一级阻尼系统1，二级阻尼系统2和三级阻尼系统3，所述一级阻尼系统1与所述二级阻尼系统2并联相接，在所述二级阻尼系统2上设有能够对低压进行泄压的通道，此时的低压是指油路产生的液压压力值小于第一溢流阀的开启压力值，所述三级阻尼系统3的一端连接于所述一级阻尼系统1与所述二级阻尼系统2的汇流点，另一端与缸体4内的有杆腔相接通。
其中，所述一级阻尼系统1包括有阻尼器11，在所述阻尼器11的前端设有电磁阀12，通过所述电磁阀12能够控制所述阻尼器11锁所在油路上的开关，即控制液压系统通过所述一级阻尼系统1，进入至所述阻尼器11；所述二级阻尼系统2包括第一溢流阀，请结合图2，在所述第一溢流阀的阀盖上开设有缺口26，所述缺口26的横截面面积的平方与油路压力成反比，使所述第一溢流阀在关闭状态下仍然能产生一定的阻尼，弥补由所述一级阻尼系统1转为所述二级阻尼系统2时产生的阶跃，使所述一级阻尼系统1在向所述二级阻尼系统2进行切换过程中，阻尼压力能够实现平稳上升；在所述三级阻尼系统3上设有第二溢流阀。
所述第一溢流阀包括阀座21，在所述阀座21的中部装有阀芯22， 所述阀芯22的顶端嵌套有弹簧23，所述弹簧23的顶端通过调节元件24进行固定，所述调节元件24用于进行压力调整，所述弹簧23及所述调节元件24容置在阀体25内部，在所述阀体25的底部装有阀盖，装配过程中，首先以所述阀座21为支撑，将所述阀芯22套在所述阀座21内，在所述阀芯22的顶端套设所述弹簧23，通过所述调节元件24对所述弹簧23的顶端进行固定，形成一体结构，通过对所述弹簧23和所述调节元件24组装后的性能进行测试，如果测试不达标，方便进行及时更换部件；反之，将所述阀盖与所述阀体25相接，将所述调节元件24、所述弹簧23一体插入至所述阀体25内部，使所述阀盖与所述调节元件24相接触，形成所述第一溢流阀，通过对所述第一溢流阀进行结构改进，并且采用新的装配方法，能够确保在所述弹簧23和所述调节元件24装入所述阀体25前进行检测，避免了整体组装完成后需要进行频繁拆卸，造成工作效率低下，影响产品的质量。
为了能使本领域技术人员更为清晰的理解本发明的设计思路，下面对其工作过程进行详细的描述。车辆启动后，所述一级阻尼系统1上的电磁阀12处于得电状态，此时，压力控制油路上由所述一级阻尼系统1和所述二级阻尼系统2共同提供减震阻尼，当车辆进行转弯并旋转至一定角度时，所述一级阻尼系统1上的电磁阀12处于失电状态，此时，压力控制油路由所述二级阻尼系统2提供减震阻尼，即液压油仅从所述二级阻尼系统2上流通，由于在所述二级阻尼系统2上设有第一溢流阀，在所述第一溢流阀上设有缺口26，当油路产生的液压压力值小于所述第一溢流阀的开启压力时，在所述第一溢流阀没有开启的情况下，液压油可以通过缺口向外缓缓流出，并产生一定的阻尼压力，该压力值与流经的液压油的油量呈正比，即车辆的转弯速度成正比，此时所述第一溢流阀发挥阻尼功效；随着液压油油量的不断增加，产生的压力值也在不断上升，当产生的压力值达到一定值时，会触发所述第一溢流阀开启，此时所述第一溢流阀发挥溢流功效。
结合上述工作过程，所述一级阻尼系统1上的电磁阀12在关闭 前后，即压力控制油路上的减震阻尼由所述一级阻尼系统1与所述二级阻尼系统2共同提供转变为仅由所述二级阻尼系统2提供时，具有以下技术效果：(1)减震阻尼能够实现平稳的上升，解决了现有技术中容易产生阶跃的问题，保证了车辆在行驶过程中的平稳性；(2)现有技术中，当所述二级阻尼系统2上的第一溢流阀出现卡死时，通过所述缺口进行过油，能够避免出现溢流阀卡死引起缸体4爆缸，造成车辆失控的现象，提升了车辆的安全性；(3)由于所述缺口的横截面面积的平方与油路压力成反比，在所述第一溢流阀处于关闭状态下，通过调整所述缺口的大小，可以对所述第一溢流阀过油时产生的阻尼进行调节，满足不同车辆的行驶要求，提升灵活性。
进一步地，本发明在所述缸体4上设有集成块5，请参照图3，在所述集成块5的中部设有过油槽6，在所述集成块5的周边设有水平注油口7和垂直注油口8，能够有效解决所述集成块5在开设注油口时造成切边、破边现象，大幅度降低了加工难度，有助于提升集成块5的合格率，方便与减震器进行焊接，提高减震器的质量；同时能够增加注油速度，避免电磁阀12出现卡死现象，提高生产效率。
以上所述的仅是本发明的优选实施方式，应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (6)

  1. 一种用于铰接车辆的液压缓冲系统，包括由缸体和活塞组件组成的液压缸，通过压力控制油路驱动活塞组件的伸缩量，在所述液压缸上装有减震器，其特征在于，所述压力控制油路包括一级阻尼系统，二级阻尼系统和三级阻尼系统，所述一级阻尼系统与所述二级阻尼系统并联相接，在所述二级阻尼系统上设有泄压通道，所述三阶阻尼系统的一端连接于所述一级阻尼系统与所述二级阻尼系统的汇流点，另一端与缸体内的有杆腔相接通。
  2. 根据权利要求1所述的一种用于铰接车辆的液压缓冲系统，其特征在于，所述二级阻尼系统包括第一溢流阀，所述第一溢流阀在关闭状态下能产生阻尼；所述一级阻尼系统包括有阻尼器，在所述阻尼器的前端设有电磁阀；所述三级阻尼系统包括第二溢流阀。
  3. 根据权利要求2所述的一种用于铰接车辆的液压缓冲系统，其特征在于，在所述第一溢流阀的阀盖上开设有缺口，所述缺口的横截面面积的平方与油路压力成反比。
  4. 根据权利要求1-4任一项所述的一种用于铰接车辆的液压缓冲系统，其特征在于，在所述缸体上设有集成块，在所述集成块的中部设有过油槽，在所述集成块的周边设有水平注油口和垂直注油口。
  5. 根据权利要求2或3所述的一种用于铰接车辆的液压缓冲系统，其特征在于，所述第一溢流阀或者所述第二溢流阀包括阀座，在所述阀座的中部装有阀芯，所述阀芯的顶端嵌套有弹簧，所述弹簧的顶端通过调节元件进行固定，所述弹簧及所述调节元件容置在阀体内部，在所述阀体的底部装有阀盖。
  6. 一种对权利要求2中的第一溢流阀的组装方法，其特征在于，包括以下步骤：(1)以所述阀座为支撑，将所述阀芯套在所述阀座内，在所述阀芯的顶端套设所述弹簧，通过所述调节元件对所述弹簧的顶端进行固定，形成一体结构；(2)将所述阀盖与所述阀体相接，将所 述调节元件、所述弹簧一体插入至所述阀体内部，使所述阀盖与所述调节元件相接触，形成溢流阀。
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